In this Oct. 14, 2011 file photo, Chicago Mayor Rahm Emanuel (right) greets South Korean President Lee Myung-bak and his wife Kim Yoon-Ok on their arrival at O'Hare International Airport for a visit to Chicago. Emanuel and the city will be in the international spotlight when it hosts the NATO summit May 20-21. Myung-bak is among the 50 heads of state expected to attend. (ASSOCIATED PRESS / Paul Beaty, File)
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